Viscose and cuprammonium cellulose spinning solutions and products thereof



Patented Nov. 17, 1936 UNITED STATE PATENT OFFICE VISCOSE AND CUPRAMMONIUM CELLULOSE SPINNING SOLUTIONS AND THEREOF PRODUCTS Rudolph S. Bley, Elizabethton, Tenn., assignor to North American Rayon Corporation, New York, N. Y., a corporation of Delaware 12 Claims.

This is a divisional application of my copending application Serial No. 743,301, filed September 8, 1934.

The present invention relates to the production of soft-lustre cellulosic products, such as filaments, yarn, ribbons, films, etc., from viscose and cuprammonium cellulose solutions.

One object of my invention has to do with the emulsification of an alkyl-naphthalene having the structure C10H'7-(R)x in which R represents an alkyl groupwith a cellulosic spinning solution to produce, after extrusion into conventional spinning baths, soft-lustre products of pleasing hand.

Another object of my invention relates to the incorporation of a phenyl-naphthalene-having the structure C10H7.(R1)x in which R1 represents a phenyl groupinto cellulosic spinning solutions for the manufacture of soft-lustre products.

Other objects of my invention will become apparent to those skilled in the art after a study of the following specification.

I am well aware that it has, heretofore, been proposed to disperse hydronaphthalenes and halogenated naphthalenes in cellulosic spinning solutions with a view of obtaining delustered filaments. However, it has been found that hydronaphthalenes evaporate too rapidly from the extruded filaments, and that halogenated naphthalenes, such as halowax, are rather unstable in combination with cellulosic products, this being probably due to their chlorine content. These deficiencies, however, are unexpectedly overcome by uniformly distributing and/or emulsifying high-boiling alkyland phenyl naphthalenes in viscose and cup-rammonium cellulose solutions. The following table will serve to illustrate the physical characteristics of some naphthalene derivatives suitable as delustering agent, although I wish to em phasize that my process is not limited to these compounds. Any alkyland phenyl-derivative of naphthalene, which is substantially water and alkali-insoluble, colorless and resistant to the attack by acidic spinning baths, may be used to modify the lustre of viscose and cuprammonium cellulose products. In order to prevent rapid evaporation from the extruded products, I prefer to use alkyland phenyl-naphthalenes boiling above l C. The amounts of these derivatives may be varied within wide limits, although an addition of about 1 to 10% is generally sufiicient to deluster the aforementioned cellulosic products, these percentages being calculated on the cellulose content of the solutions.

After thoroughly emulsifying the naphthalene derivative with the spinning solution, it is spun in conventional manner into setting baths. Finely divided pigments, such as titanium dioxide, etc., may be dispersed in an alkylor phenyl-naphthalene to form an organosol. Subsequently this organosol may be emulsified with a spining solution to modify the lustre of the finished products.

I wish to emphasize that the compounds as well as the proportions, set forth above, may be varied to a large extent without departing from the spirit and scope of my invention.

TABLE Physical characteristics of some alkyland phenyl-naphthalenes 1. A spinning solution for the manufacture of soft-lustre products comprising a substance selected from the group consisting of viscose and cuprammonium cellulose together with a phenylnaphthalene, said naphthalene being substantially waterand alkali-insoluble, having a boiling point above 100 C. and the structure C10H7.(R1)x in which R1 represents a phenyl group.

2. A spinning solution for the manufacture of soft-lustre products comprising a substance selected from the group consisting of viscose and cuprammonium cellulose together with a diphenyl-naphthalene, said naphthalene being substantially waterand alkali-insoluble and having a boiling point above 100 C.

3. A spinning solution for the manufacture of soft-lustre products comprising a substance selected from the group consisting of viscose and cuprammonium cellulose together with an alpha-phenyl-naphthalene, said naphthalene being substantially waterand alkali-insoluble and having a boiling point of above 100 C.

4. A spinning solution for the manufacture of soft-lustre products comprising a substance selected from the group consisting of viscose and cuprammonium cellulose together with a betaphenyl-naphthalene, said naphthalene being substantially waterand alkali-insoluble and having a boiling point above 100 C.

5. A spinning solution for the manufacture of soft-lustre products comprising a substance of the group consisting of viscose and cuprammonium cellulose together with 1 to 10% of a phenyl-naphthalene, said naphthalene being substantially waterand alkali-insoluble, having a boiling point above 100 C. and the structure C10H7.(R1) X in which R1 represents a phenyl group and said percentages being calculated on the cellulose content of said spinning solution.

6. A spinning solution for the manufacture of soft-lustre products comprising a substance of the group consisting of viscose and cuprammonium cellulose together with 1 to 10% of a diphenyl-naphthalene, said naphthalene being substantially waterand alkali-insoluble, having a boiling point above 100 C. and the structure C10H7.(R1)x in which R1 represents a phenyl group and said percentages being calculated on the cellulose content of said spinning solution.

7. A spinning solution for the manufacture of soft-lustre products comprising a substance of the group consisting of viscose and cuprammonium cellulose together with 1 to 10% of an alpha-phenyl-naphthalene, said naphthalene being substantially waterand alkali-insoluble, having a boiling point above 100 C. and the structure C10H7.(R1)x in which R1 represents a phenyl group and said percentages being calculated on the cellulose content of said spinning solution.

8. A spinning solution for the manufacture of soft-lustre products comprising a substance of the group consisting of viscose and cuprammonium cellulose together with 1 to 10% of a beta-phenyl-naphthalene, said naphthalene being substantially waterand alkali-insoluble, having a boiling point above 100 C. and the structure C10HI.(R1)x in which R1 represents a phenyl group and said percentages being calculated on the cellulose content of said spinning solution.

9. A soft lustre cellulosic product of the group consisting of viscose and cuprammonium cellulose containing a phenyl-naphthalene.

10. A soft lustre cellulosic product of the group consisting of viscose and cuprammonium cellulose containing a diphenyl-naphthalene.

11. A soft lustre cellulosic product of the group consisting of viscose and cuprammonium cellulose containing an alpha-phenyl-naphtha1ene.

12. A soft lustre cellulosic product of the group consisting of viscose and cuprammonium cellulose containing a beta-phenyl-naphthalene.

RUDOLPH S. BLEY. 

